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Author:s.arikawa

New Resources

  • 正17角形 作図 regular 17-gon 2
  • 等積変形2
  • standingwave-plus
  • 直線の軌跡
  • 接点の作る円は内接円

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  • 円と楕円
  • 等角共役点OHGK
  • 三角形に関する極と極線
  • 星型正八面体
  • 同じ広さはどこ?(半円と正三角形)

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  • Ratios
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  • Kite
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